A closed-form axisymmetric solution was derived for the transient thermal-stress fields developed in thick-walled tubes subjected to an arbitrary thermal loading on the internal surface with convection to the surrounding external environment. Generalization of the temperature excitation was achieved by using a versatile polynomial composed of integral-and half-order terms. In order to avoid the difficult and potentially error prone evaluation of functions with complex arguments, Laplace transformation and a ten-term Gaver-Stehfest inversion formula were used to solve the resulting Volterra integral equation. The ensuing series representation of the temperature distribution as a function of time and radial position was then used to derive new relationships for the transient thermoelastic stress-states. Excellent agreement was seen between the derived temperature and stress relationships, existing series solutions, and a finite-element analysis when the thermophysical and thermoelastic properties were assumed to be independent of temperature. The use of a smoothed polynomial in the derived relationships allows the incorporation of empirical data not easily represented by standard functions. This in turn permits an easy analysis of the significance of the exponential boundary condition and convective coefficient in determining the magnitudes and distribution of the resulting stress states over time. Moreover, the resulting relationships are easily programmed and can be used to verify and calibrate numerical calculations.
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August 2004
Technical Papers
Thermoelastic Stresses in an Axisymmetric Thick-Walled Tube Under an Arbitrary Internal Transient
A. E. Segall, Mem. ASME, Associate Professor
e-mail: aesegall@psu.edu
A. E. Segall, Mem. ASME, Associate Professor
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802
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A. E. Segall, Mem. ASME, Associate Professor
Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802
e-mail: aesegall@psu.edu
Contributed by the Pressure Vessels and Piping Division for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received by the PVP Division August 5, 2003; revision received February 12, 2004. Associate Editor: R. J. Scavuzzo.
J. Pressure Vessel Technol. Aug 2004, 126(3): 327-332 (6 pages)
Published Online: August 18, 2004
Article history
Received:
August 5, 2003
Revised:
February 12, 2004
Online:
August 18, 2004
Citation
Segall, A. E. (August 18, 2004). "Thermoelastic Stresses in an Axisymmetric Thick-Walled Tube Under an Arbitrary Internal Transient ." ASME. J. Pressure Vessel Technol. August 2004; 126(3): 327–332. https://doi.org/10.1115/1.1762461
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